Enhanced Time Resolution Using Multiple Receptions

1. A digital communications system comprising: a wavelet decomposition filter bank; and a signal generator operable to generate a plurality of sub-signals by passing a pseudo random (PN) sequence through the wavelet decomposition filter bank; wherein the wavelet decomposition filter bank divides the spectrum such that a portion of the PN sequence having an index of i contains a spectrum of the original PN sequence corresponding to the interval of [2iπ/N, 2(i+1)π/N] where N is the number of sub-bands.

2. The system of claim 1 , wherein the sub-signals are sent in the same band in different time slots and combined at the signal receiver using a single static channel.

3. The system of claim 1 , wherein the wavelet decomposition filter bank includes a DFT bank.

4. A system comprising: a signal generator operable to generate a plurality of sub-signals by passing a pseudo random (PN) sequence through wavelet decomposition filter bank; and a signal receiver operable to combine the received sub-signals using a synthesis filter bank; wherein the wavelet decomposition filter bank divides the spectrum such that a portion of the PN sequence having an index of i contains a spectrum of the original PN sequence corresponding to the interval of [2iπ/N, 2(i+1)π/N] where N is the number of sub-bands.

5. The system of claim 4 , wherein the plurality of sub-signals are generated according to the formula x t ⁡ ( t ) = ∑ n ⁢ ⁢ c i ⁡ ( n ) ⁢ s ⁡ ( t - nT s ) where x i comprises a sub-signal, c i comprises a portion of the PN sequence in the sub-signal and s is a spectrum shaping pulse with duration T s and wherein the sub-signal is sent in a corresponding sub-band.

6. The system of claim 5 , wherein T s is determined as 1/w where w is the available bandwidth.

7. The system of claim 5 , wherein each sub-band signal is sampled after matched filtering at a rate of w.